Johannesburg's hail season
The Highveld's summer thunderstorms are the most hail-prone in the country. From October to March, moist afternoon air rises off the 1,700 m plateau, builds towering storm cells, and drops hail from pea-size to golf-ball-size — occasionally larger. The 2016 and 2023 Gauteng hailstorms wrote off thousands of vehicles in an afternoon. A carport is the cheapest standing insurance against that, but only if its roof can take the impact.
What stops hail, and what doesn't
| Roof | Small hail | Large hail |
|---|---|---|
| IBR / Q-deck steel | Stops | Stops |
| Polycarbonate (thick) | Stops | Can crack |
| Polycarbonate (thin) / PVC | Dents/cracks | Shatters |
| Shade net | Slows | Tears / passes through |
Steel IBR is the only roof that reliably stops the large stones, which is why it is the Highveld carport standard. This is the core reason a steel carport beats a shadeport for hail — set out plainly in carport vs shadeport.
Gauge and pitch — the two specs that matter
Two things make a steel roof hail-proof rather than just steel-looking. Gauge is the sheet thickness: 0.5 mm+ IBR resists denting where a thin 0.3 mm sheet dents. Pitch is the slope: a steeper roof lets hail strike a glancing angle and roll off, where a near-flat roof takes the full impact and collects stones. KB Carports specs both for the Highveld — a real gauge and a real fall — which the cheapest quotes cut to hit a price. Get the pitch decision alongside the look in carport designs.
Fitting for the storm
Roof sheeting stops the hail; anchoring stops the storm wind that comes with it. A Highveld storm hits with a gust front before the hail, so the same structure needs footings and bracing rated for uplift — the reason cheap, under-anchored carports lift and buckle in summer. It all comes together on the carport prices in Johannesburg page and in how installation works.
Common questions
Does a carport protect a car from hail?
A carport with a solid steel IBR or Q-deck roof protects a car from Highveld hail, including the large stones a Johannesburg summer storm drops. A carport with only shade net or thin polycarbonate does not — the net tears and thin sheeting shatters.
What carport roof is best for Highveld hail?
IBR or Q-deck steel sheeting at 0.5 mm or heavier gauge, on a properly pitched frame, is the best carport roof for Highveld hail. The steel takes the impact and the slope lets stones roll off rather than collecting.
When is hail season in Johannesburg?
Johannesburg's hail season runs from October to March, when Highveld afternoon thunderstorms drop hail ranging from pea-size to golf-ball-size. It is the most hail-prone region in South Africa, which is why carport roof choice matters here.